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Part number: 12-309-4
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Product Details
Comp Cams 12-309-4 Magnum Muscle Muscle Car Camshaft
Products specifications
Advertised Duration 284 int./284 exh.
Advertised Exhaust Duration 284
Advertised Intake Duration 284
Basic Operating RPM Range 2,500-6,500
Cam Style Mechanical flat tappet
Computer-Controlled Compatible No
Duration at 050 inch Lift 246 int./246 exh.
Exhaust Duration at 050 inch Lift 246
Exhaust Valve Lash 0.024 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio 0.489 in.
Grind Number CS 284S-10
Intake Duration at 050 inch Lift 246
Intake Valve Lash 0.024 in.
Intake Valve Lift with Factory Rocker Arm Ratio 0.489 in.
Lobe Separation (degrees) 110
Quantity Sold individually.
Valve Lift with Factory Rocker Arm Ratio 0.489 int./0.489 exh. lift
Valve Springs Required Yes
Title 12-309-4 CamShaft, CS 284S-10
Engine Make/Size Chevy Small Block (262-400)
RPM Range 1000-7000
Usage Street/Performance
Exh. Duration @ .050 in. (Deg) 246
Exh. Duration Advertised (Deg) 284
Exhaust Valve Lift (in.) 0.489
Int. Duration @ .050 in. (Deg) 246
Int. Duration Advertised (Deg) 284
Intake Valve Lift (in.) 0.489
Lifter Type Hydraulic Flat Tappet
  • Muscle Car Camshaft
  • 1 Year Limited Warranty
Reviews
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W
Great pricing and quick shipping.  GREAT
J
Web site is very easy to follow or use.
I'm thinking of finding other parts here.
The battery has been delivered so quickly. It'd be better to see the order status changed from processing to shipping (or something) to know that it actually was shipped. Bu
E
so far so good
H
This store had a lot of products more than most other sites I looked at.  The order was processed quickley and shiped the next day. I will use them again.
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